After fixing some boneheadedness in the ASIC event code (and a whole passel of translator caching and other bugs), I’ve finally gotten to the login prompt:
(to clarify, this is the dreamcast-linux-010605 ISO that Takeshi Yaegashi put together several years ago, running a modified 2.4.5 kernel)

Unfortunately (after the happy dance), it was at this point that I realised I haven’t actually implemented the keyboard yet, so it’s impossible to do anything useful with it. It’s also admittedly painfully slow to start, but I was expecting that (TLB lookup is currently near pessimal).

Anyway, working on the keyboard driver now ^_^.

PS: If anyone has a working link to this image, please let me know where it is (I’d like to keep a link to it) – my google-fu has utterly failed to turn up a good version as yet, and my own copy is only on a somewhat scratched CD…Changes

Add VMA support to the SH4 disassembly functions

Handle out-of-page delay slot execution with emulation single-step

Finish translator breakpoint implementation

Fix a pair of long standing ASIC event bugs

Fix xltcache forgetting to clear references to blocks before overwriting them

Fix MAC.L/MAC.W exception handling (broke the stack if the second arg caused an exception)

Fix various other minor bugs

Update: Just hacked together a quick keyboard driver, able to login and launch X now. Excellent…

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on Wednesday, January 23rd, 2008 at 9:27 am and is filed under Development.
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fackue: No idea. If you’re lucky you might be able to get it to work using cygwin (with their X11 port) – feel free to try it and let me know how it goes

If anyone’s interested in doing a “real” port, I’d be more than happy to integrate the changes, but personally I don’t see a lot of point in working on it at the moment when we’re not even at parity with the existing win32 dreamcast emulators.